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                小K的农场                </h1>
                <p>时间限制：10s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：128MB</p>			</div>
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                                <h3>题目描述</h3><p><div>背景</div>
<div>小K是个特么喜欢玩MC的孩纸。。。</div>
<div>描述</div>
<div>小K在MC里面建立很多很多的农场，总共n个，以至于他自己都忘记了每个农场中种植作物的具体数量了，他只记得</div>
<div>一些含糊的信息（共m个），以下列三种形式描述：农场a比农场b至少多种植了c个单位的作物，农场a比农场b至多</div>
<div>多种植了c个单位的作物，农场a与农场b种植的作物数一样多。但是，由于小K的记忆有些偏差，所以他想要知道存</div>
<div>不存在一种情况，使得农场的种植作物数量与他记忆中的所有信息吻合。</div></p><hr/><h3>输入格式</h3><p><div>第一行包括两个整数n和m，分别表示农场数目和小K记忆中的信息的数目接下来m行：如果每行的第一个数是1，接</div>
<div>下来有三个整数a,b,c，表示农场a比农场b至少多种植了c个单位的作物如果每行第一个数是2，接下来有三个整数a</div>
<div>，b，c，表示农场a比农场b至多多种植了c个单位的作物如果每行第一个数是3，接下来有两个整数a,b，表示农场a</div>
<div>种植的数量与b一样。1&lt;=n,m,a,b,c&lt;=10000</div>
<p></p></p><hr/><h3>输出格式</h3><p><p>如果存在某种情况与小K的记忆吻合，输出&rdquo;Yes&rdquo;，否则输出&rdquo;No&rdquo;</p>
<p></p></p><hr/><h3>样例输入</h3><pre>3 3
3 1 2
1 1 3 1
2 2 3 2</pre><hr/><h3>样例输出</h3><pre>Yes
样例解释
三个农场种植的数量可以为（2,2,1）</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>Kpmcup#0 By Greens
</p>
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